Ecosyste.ms: Advisories

Security Advisories: MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLXhnaDYtODV4aC00Nzlw

Regular Expression Denial of Service in npm-user-validate

npm-user-validate before version 1.0.1 is vulnerable to a Regular Expression Denial of Service (REDos). The regex that validates user emails took exponentially longer to process long input strings beginning with @ characters.

Impact

The issue affects the email function. If you use this function to process arbitrary user input with no character limit the application may be susceptible to Denial of Service.

Patches

The issue is patched in version 1.0.1 by improving the regular expression used and also enforcing a 254 character limit.

Workarounds

Restrict the character length to a reasonable degree before passing a value to .emal(); Also, consider doing a more rigorous sanitizing/validation beforehand.

Permalink: https://github.com/advisories/GHSA-xgh6-85xh-479p
JSON: https://advisories.ecosyste.ms/api/v1/advisories/MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLXhnaDYtODV4aC00Nzlw
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Low
Classification: General
Published: over 3 years ago
Updated: over 1 year ago

Identifiers: GHSA-xgh6-85xh-479p
References:

• https://github.com/npm/npm-user-validate/security/advisories/GHSA-xgh6-85xh-479p
• https://github.com/advisories/GHSA-xgh6-85xh-479p

Repository: https://github.com/npm/npm-user-validate
Blast Radius: 0.0

Affected Packages